The ones I listed are probably a bit on the highbrow side but also good enough so they gained a fair deal of mainstream success.
guillem
joined 2 years ago
Airport thriller is a new concept to me so I'm not sure if these qualify:
Zafón's La sombra del viento. A best-seller, quite dark and riveting with a Spanish Civil War background.
Teixidor's El libro de las moscas. I don't know if it was originally written in Catalan or in Spanish though. More mystery than thriller as far as I remember.
García-Márquez's Crónica de una muerte anunciada. Absolute classics, both book and author.
Atxaga's Obabakoak. Also more mystery than thriller. Also originally written in Basque, but the Spanish translation was done by the author himself.
We aren't. I can't find a source to the dog's toys but Phys.org does say it was buried with a person.